Rockin Beads Brand 80 Yards Black Waxed Cotton Cord 2mm to 3mm for Bracelet/ Necklace 80 Meeter Irregular Diameters thickness can verry Approx 2mm to 3mm diameters. 80 Yards Black Waxed Cotton Medium Stiffnes Necklace 80 Meeters Rockin Beads (TM) Brand comes with Rockin Beads Size Gauge Card